<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 选择器{样式} */
        /* 给谁改样式{改什么样式} */
        p {
            color: brown;
            /* 修改文字大小为十二像素 */
            font-size: 12px;
        }
    </style>
</head>
<body>
    <p>你个垃圾</p>
</body>
</html>